Re: Transport table and postmap

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Transport table and postmap
\ Richard Stockton (8 May 2008)
. \ (Wietse Venema) (8 May 2008)
. \ mouss (8 May 2008)
. . \ D Hill (8 May 2008)
. . \ Zbigniew Szalbot (8 May 2008)
. . . \ (Wietse Venema) (8 May 2008)
. \ (Wietse Venema) (8 May 2008)
. . \ Richard Stockton (8 May 2008)
. . . \ (Wietse Venema) (8 May 2008)

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Subject:	Re: Transport table and postmap
Group:	Postfix-users
From:	(Wietse Venema)
Date:	8 May 2008

Richard Stockton:
> At 02:14 PM 5/8/2008, Wietse Venema wrote:
> > > I am noticing an odd and somewhat disturbing thing on my FreeBSD
> > > postfix installations. When I redo my transport table,
> > >
> > > postmap /etc/postfix/transport
> > >
> > > and then do a "strings /etc/postfix/transport.db" I see not only
> > > the contents of the "transport" file, but also my entire master
> > > password file including the password hashes! That seems like a
> > > very bad thing. This occurs on all 8 of my FreeBSD postfix
> > > installations.
> >
> >You may want to update the bug report.
> >
> >In /usr/src/lib/libc/db/README, it says compile with -DPURIFY
> >otherwise it will write uninitialized memory to the file.
> >
> >I just checked, and this fixes the problem. You have to add a line
> >with: #include <string.h> to /usr/src/lib/libc/db/db/hash/hash_buf.c
>
> I have updated the FreeBSD bug report, although I note that the file
> above does not exist on my machines. I have a /usr/src/lib/libc/db/db
> directory but nothing beyond that even though I have compiled custom
> kernels on all the servers. Looks to me like "hash" was never compiled.

You can install kernel sources without installing userland sources.
I usually install kernel and userland source, so I can build a
smaller kernel and apply bugfixes to kernel or userland.

Wietse